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APACHE II Score Calculator

ICU mortality prediction using acute physiology and chronic health evaluation

Calculate APACHE II

Clinical use

Use this calculator for icu mortality prediction using acute physiology and chronic health evaluation in thecritical care workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

ICU mortality predictor. Score >25: ≈50% mortality. Best calculated within first 24h of ICU admission. Use worst values. Not validated for serial measurements.

Required inputs

  • Temperature
  • Mean Arterial Pressure
  • Heart Rate
  • Respiratory Rate
  • Oxygenation
  • Fio 2
  • Arterial Ph
  • Sodium
  • Potassium
  • Creatinine
  • Hematocrit
  • Wbc
  • Gcs
  • Age
  • Chronic Health

Evidence and limitations

This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

  • Knaus WA et al. Crit Care Med 1985;13:818-829

Frequently asked questions

What is the APACHE II Score?

APACHE II Score is a clinical calculator used for ICU mortality prediction using acute physiology and chronic health evaluation.

How do I interpret the APACHE II Score?

ICU mortality predictor. Score >25: ≈50% mortality. Best calculated within first 24h of ICU admission. Use worst values. Not validated for serial measurements.

What inputs are required for the APACHE II Score?

Required inputs include Temperature, Mean Arterial Pressure, Heart Rate, Respiratory Rate, Oxygenation, Fio 2, Arterial Ph, Sodium, Potassium, Creatinine, Hematocrit, Wbc, Gcs, Age, Chronic Health.

What is the evidence behind the APACHE II Score?

The APACHE II Score page cites Knaus WA et al. Crit Care Med 1985;13:818-829.

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